This study presents and compares results obtained with inside-to-out polyethersulfone ultrafiltration membranes operated on three different wastewater streams in two locations. The first stream tested originated from a wastewater containing powdered activated carbon (PAC) added to a contact reactor with a long contact time and continuous coagulation. In the second stream, the PAC was added upstream of the membranes with a short contact time. Coagulant dosing took place in front of the feed pump in an intermittent manner called coagulant coating. Finally, the third test was performed with the same contact time as the latter, but at significantly higher concentrations of PAC. Long-term follow-up of the operation demonstrates that such membrane can be used as a polishing step and that the membranes do not suffer from any performance or integrity loss. The study shows that the membrane can easily accept high concentrations of PAC, up to 240 mg/L. The results highlight the importance of the type of PAC, the contact time and the coagulation process on the rejection rate of micropollutants. As part of this research, rejection rates of antibiotic resistant genes by ultrafiltration have been analyzed and will be displayed.
This presentation is available to AMTA Members only.
Speaker
- Joseph Kelly
Company
- DuPont Water Solutions
Event
- AMTA/AWWA Membrane Technology Conference, West Palm Beach, FL
Session
- AMTA/AWWA Membrane Technology Conference
Date
- 07/20/21
Media
Keywords
- Antibiotic Resistant Genes, Disinfection By-Products, Micropollutants, Powerdered Activated Carbon
Reference
- 9710-DP2739